RNA polymerase I-specific transcription initiation factor RRN9 (RRN9) is a 365-residue protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c). This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P53437.
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The mean pLDDT of this model is 62.8 (low overall). pLDDT is AlphaFold's per-residue confidence score from 0 to 100. In MolViewer, choose the B-factor color scheme to color the model by pLDDT, because AlphaFold stores it in the B-factor column.
| pLDDT band | Meaning | Share of residues |
|---|---|---|
| Above 90 | Very high: backbone and side chains are usually accurate | 0% |
| 70 to 90 | Confident: backbone generally right | 42% |
| 50 to 70 | Low: treat with caution | 31% |
| Below 50 | Very low: often disordered regions | 27% |
What pLDDT means and how to read it
Component of the UAF (upstream activation factor) complex which interacts with the upstream element of the RNA polymerase I promoter and forms a stable preinitiation complex. Together with SPT15/TBP UAF seems to stimulate basal transcription to a fully activated level
Component of the UAF (upstream activation factor) complex which consists of UAF30, RRN5, RRN9, RRN10, and histones H3 and H4. Interacts with SPT15 and RRN7
Nucleus, nucleolus
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 7Z0O | EM | 2.8 Å | E=1-365 |
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